Improvement in heating-stoves



E. STEWART.

. HEA-TING-STOVE. No.189,28,0.

' Patented Apri1s,.1's77. v

fFFICE@ l f EDWARD? STEWART, o'i' roar inimsom ro ,WA-.l

I Specification lprjrninglV partrof LettersBatento. 1789,280, dated April 3,1877;'app1ication led v n l ,l AllIar,0l 1rl ,l877.y 5

Beit known that L EDWARD STEWART; of'

the city of Fort Madison, county of Iiee, and State o f Iowa, have invented nelwanduseful Improvements in, Heating-Stoves; andI dov hereby declare the following ,to'bea full," clear, and exact description of the invention,v

such as will enable others skilled in the, art to which it pertains to make land use it, reference being had to the accompanying drawings,

which form part of this specication.

f bustion can quickly pass out, or that they may, on the other hand, be conducted through an indirect-draft passage, which will allow of their heat being saved and utilized by conduction through these several sheets formed about the bottom and sides of the fire-box. I place a double lining-wall within the fire-box, extending about its bottomand sides, leaving its ltop with a single sheet. This double lining forms a hot-air chamber, which is closed as regards the fire-box, but has free ventilation with the louter atmosphere, and an indirectdraft passage is also formed between the double lining and the outer wall of the stove. Thus I obtain a large heating-surface, and at the same time protect the lining of the firebox from burning out. i

Referring to the drawings, Figure l is a view, in perspective, of a stove embodying my invention. Fig. 2 is a transverse vertical section through the same, and Fig. 3 is a detail view of the damper device regulating the direct and indirect drafts in the same. v

A represents the outer plate of .the stove, having an air-passage, B, formed between the same and the double lining G C', and extending about the latter from its open connection at one side with the interior of the {ire-box,

down alongside and beneath the double lining C C', and, nally, up the opposite side of the rebox, where it connects-freely'with the exit- "flue D', This exit side of the passage isclos'ed lfrom off the iirebox, so that'commun'cation with'the."hot=air passage can. onlyv obtain at ,one side ofy the fire-box, and air passing into th'esame is conducted around thefl'ower'vhoriz'ontal section of the'box, and thence immediately into the exit-flue.

A damper,"E, regulates thisexitiflu'e bybe- Y Ai'ng'placedso as toopen or close connection from theviire-box direct into the-lue, which.

latter extends to either horizontal side of the partition-wall b, shutting off connection between the lire-box and the exit side of flue B.

As this damper only governs the passage from the fire-box chamber direct to the ilue, While the connection between the air-passage B and the said flue is uninterrupted and perfectly free, it follows that by opening the damper the products of combustion will seek an immediate outlet thereby without traversing the airpassage; but on closing this damper, the hot air will be forced to take a circuitous course through passage B, and-thus out by that lower portion of the liue D which connects with the same.

The fire-box is provided with a double lining, C C', forming a hot-air chamber, F, which is closed as regards the fire-box, but has free ventilation with the outer atmosphere. Any suitable manner of connecting this chamber with the air may be employed. Thus perforations, slots, or lattice open-work may be made in the rear end plate of the stove, opening into the said chamber, and also in the stovedoor, corresponding to the front end of the same. o

A through draft or current is thus obtained, while an air-feed opening, G, in the lower central portion of the stove conducts air directly into the chamber from below, and supplies it constantly with cold air, which latter, becoming heated, passes out only through the end openings of the chamber.

In Fig. 3 I showin detail my manner of automatically regulating the damper, so that upon opening the stove-door a direct draft to the flue will be furnished, and upon again shutting the same the direct draft will be closed, and the products of combustion forced to take the indirect-draft passage. The slid- `door, and the draft b e correspondingly regu- Having fully described my invention, what ing damper E is provided with the damperrod `H, extending forward and 4out through the front end of the stove, its projecting extremity being toothed or formed as a rackbar, which is engaged by arpinionJ, suitably secured to the hinged side of the stove-door Kv. As the door is swung open, the piniqn and rack operates the damper-rod, so as to open the draft-connection directl between the firebox and the exit-line, while on swinging the door to, the damper-rod is drawn ont again, thus closing the direct draft.

If desired to operate the damper `without opening the door, the damper-rodl can be raised up in its slot in the front end of the stove, thus disengaging its rack side from the actuating-pinion, Aand .then the rod. can slide backward and forward independently of the lated.

I claim as new, and desire to secure by LettersPat-ent, is- Y 1. The double lining, forming a hot-air chamber about the bottom and sides of the fire-box, the indirect-.draft passage of which latter is between the said hot-air chamber and the wall ofthe stove, substantiallyasdescribed; Li

2. The combination, with'there-boxypiiovided with a double lining, forming the hotairfchamber, of the indirect-draft passage between the said double lining and the wall of the stove, substantially ,ars described.

3'. The hot-air chamber formed at the bottom and sides of the fire-box, and communieating with the -open air by'lower feed and end exit passages, as described, the said firebox being provided with an indirect-draft passagegbetween the hot-air `chftmber and the wall of the stove, substantially as described.

4. The combination, with the damper and connecting-rod, of the swinging stove-door, communicating motion to the same', ,the-said rod and door .engaging by rec'kendriniou mehauism,substantially@ described-.1 i r In testimony thatI claim the foregoingl `have hereunto set my handthis V22d dayxof February, 31877.` L 1 EDWARD STEWART-f. Witnesses: i i e EDWIN D. SMITH, M- E- RIZEB- 

